The remote Red Hat host is missing a security update.
An updated nfs-utils package that fixes a security issue and several
bugs is now available.
This update has been rated as having low security impact by the Red
Hat Security Response Team.
The nfs-utils package provides a daemon for the kernel NFS server and
It was discovered that nfs-utils did not use tcp_wrappers correctly.
Certain hosts access rules defined in '/etc/hosts.allow' and
'/etc/hosts.deny' may not have been honored, possibly allowing remote
attackers to bypass intended access restrictions. (CVE-2008-4552)
This updated package also fixes the following bugs :
* the 'LOCKD_TCPPORT' and 'LOCKD_UDPPORT' options in
'/etc/sysconfig/nfs' were not honored: the lockd daemon continued to
use random ports. With this update, these options are honored.
* it was not possible to mount NFS file systems from a system that has
the '/etc/' directory mounted on a read-only file system (this could
occur on systems with an NFS-mounted root file system). With this
update, it is possible to mount NFS file systems from a system that
has '/etc/' mounted on a read-only file system. (BZ#450646)
* arguments specified by 'STATDARG=' in '/etc/sysconfig/nfs' were
removed by the nfslock init script, meaning the arguments specified
were never passed to rpc.statd. With this update, the nfslock init
script no longer removes these arguments. (BZ#459591)
* when mounting an NFS file system from a host not specified in the
NFS server's '/etc/exports' file, a misleading 'unknown host' error
was logged on the server (the hostname lookup did not fail). With this
update, a clearer error message is provided for these situations.
* the nhfsstone benchmark utility did not work with NFS version 3 and
4. This update adds support to nhfsstone for NFS version 3 and 4. The
new nhfsstone '-2', '-3', and '-4' options are used to select an NFS
version (similar to nfsstat(8)). (BZ#465933)
* the exportfs(8) manual page contained a spelling mistake, 'djando',
in the EXAMPLES section. (BZ#474848)
* in some situations the NFS server incorrectly refused mounts to
hosts that had a host alias in a NIS netgroup. (BZ#478952)
* in some situations the NFS client used its cache, rather than using
the latest version of a file or directory from a given export. This
update adds a new mount option, 'lookupcache=', which allows the NFS
client to control how it caches files and directories. Note: The Red
Hat Enterprise Linux 5.4 kernel update (the fourth regular update)
must be installed in order to use the 'lookupcache=' option. Also,
'lookupcache=' is currently only available for NFS version 3. Support
for NFS version 4 may be introduced in future Red Hat Enterprise Linux
5 updates. Refer to Red Hat Bugzilla #511312 for further information.
Users of nfs-utils should upgrade to this updated package, which
contains backported patches to correct these issues. After installing
this update, the nfs service will be restarted automatically.
See also :
Update the affected nfs-utils package.
Risk factor :
High / CVSS Base Score : 7.5
CVSS Temporal Score : 6.5
Public Exploit Available : true